CVE-2026-82821

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-08-31. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability was determined in FLVMeta up to 1.2.2. Affected by this vulnerability is the function amf_object_get of the file src/amf.c of the component AMF Object Parsing. This manipulation causes null pointer dereference. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: 52642f7dfb76ec7334016622dde60b1ae963d79b. To fix this issue, it is recommended to deploy a patch. The project maintainer doubts the security impact: "While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities."

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

August 31, 2026

Last Modified

August 31, 2026

Advisory Details (3)

Auto-updated Aug 31, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 52642f7dfb76 (noirotm/flvmeta)

Fix landed in noirotm/flvmeta commit 52642f7dfb76 — awaiting tagged release

https://github.com/noirotm/flvmeta/commit/52642f7dfb76ec7334016622dde60b1ae963d79b
generic

Poc/flvmeta_SEGV at main · raind20001020/Poc · GitHub

https://github.com/raind20001020/Poc/blob/main/flvmeta_SEGV
generic🟡 PoC Available

Vuln:flvmeta SEGV · Issue #28 · noirotm/flvmeta · GitHub

https://github.com/noirotm/flvmeta/issues/28

Vendor Advisories for CVE-2026-82821(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
flvmeta1.2.1-1, 1.2.2-1, 1.2.2-2, 1.2.2-2~exp1——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
flvmeta1.2.2-1, 1.2.2-2, 1.2.2-2~exp1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
flvmeta1.2.2-1, 1.2.2-2, 1.2.2-2~exp1——

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 51× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 05:00 UTCEG score recompute
  2. 2026-09-19 05:00 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 04:37 UTCEG score recompute
  5. 2026-09-18 04:37 UTCGHSA enrichment
  6. 2026-09-17 04:14 UTCEG score recompute
  7. 2026-09-17 04:14 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-16 03:49 UTCGHSA enrichment
  11. 2026-09-15 03:25 UTCEG score recompute
  12. 2026-09-15 03:25 UTCGHSA enrichment
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 03:02 UTCEG score recompute
  16. 2026-09-14 03:02 UTCGHSA enrichment
  17. 2026-09-13 02:39 UTCEG score recompute
  18. 2026-09-13 02:39 UTCGHSA enrichment
  19. 2026-09-12 02:15 UTCEG score recompute
  20. 2026-09-12 02:15 UTCGHSA enrichment
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 01:51 UTCEG score recompute
  24. 2026-09-11 01:51 UTCGHSA enrichment
  25. 2026-09-10 01:28 UTCGHSA enrichment
Show 26 more
  1. 2026-09-09 01:05 UTCEG score recompute
  2. 2026-09-09 01:05 UTCGHSA enrichment
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-08 00:41 UTCEG score recompute
  5. 2026-09-08 00:40 UTCGHSA enrichment
  6. 2026-09-07 00:17 UTCEG score recompute
  7. 2026-09-07 00:17 UTCGHSA enrichment
  8. 2026-09-06 13:48 UTCEPSS rescore
  9. 2026-09-05 23:51 UTCEG score recompute
  10. 2026-09-05 23:51 UTCGHSA enrichment
  11. 2026-09-05 15:31 UTCEPSS rescore
  12. 2026-09-04 23:28 UTCEG score recompute
  13. 2026-09-04 23:28 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-03 22:12 UTCGHSA enrichment
  16. 2026-09-02 21:48 UTCEG score recompute
  17. 2026-09-02 21:48 UTCGHSA enrichment
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-01 21:24 UTCEG score recompute
  20. 2026-09-01 21:24 UTCGHSA enrichment
  21. 2026-09-01 13:54 UTCEPSS rescore
  22. 2026-08-31 20:21 UTCEG score recompute
  23. 2026-08-31 19:28 UTCEG score recompute
  24. 2026-08-31 19:21 UTCNVD updateCVSS v4 → 2.1
  25. 2026-08-31 18:50 UTCEG score recompute
  26. 2026-08-31 18:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-82821?
CVE-2026-82821 is a medium vulnerability published on August 31, 2026. A vulnerability was determined in FLVMeta up to 1.2.2. Affected by this vulnerability is the function amfobjectget of the file src/amf.c of the component AMF Object Parsing. This manipulation causes null pointer dereference. The attack may be initiated remotely. The exploit has been publicly…
When was CVE-2026-82821 disclosed?
CVE-2026-82821 was first published in the National Vulnerability Database on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82821 actively exploited?
CVE-2026-82821 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.7% of all scored CVEs.
What is the CVSS score of CVE-2026-82821?
CVE-2026-82821 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-82821?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82821, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-82821

Explore →

Is Your Infrastructure Affected by CVE-2026-82821?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs